Introduction to Linked Data: RDF Vocabularies
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The document introduces several commonly used RDF vocabularies including FOAF for describing people and their relationships, DOAP for describing software projects, and Dublin Core for describing general resources. It provides information on the namespace and homepage for each vocabulary and lists some of the main classes and properties defined in each.
Introduction to Linked Data: RDF Vocabularies
- 1. An Introduction to Linked Data Part 5 of 5 David Hyland-Wood RDF Vocabularies University of Mary Washington Wednesday, May 25, 2011
- 2. A Tour of RDF Vocabularies Wednesday, May 25, 2011
- 3. Some Commonly Used RDF Vocabularies • Friend of a Friend (FOAF) Project: http://www.foaf-project.org/ Namespace: http://xmlns.com/foaf/0.1/ • Description of a Project (DOAP) Project: http://trac.usefulinc.com/doap Namespace: http://usefulinc.com/ns/doap# • Dublin Core (DC) Project: http://dublincore.org/documents/dcq-rdf-xml/ Namespace: http://purl.org/dc/elements/1.1/ Wednesday, May 25, 2011
- 4. Some Commonly Used RDF Vocabularies • Semantically-Interlinked Online Communities (SIOC) Project: http://sioc-project.org/ Namespace: http://rdfs.org/sioc/ns# • Vocabulary of Interlinked Datasets (VoiD) Project: http://semanticweb.org/wiki/VoiD, http://vocab.deri.ie/void Namespace: http://rdfs.org/ns/void# • vCard Project: http://www.w3.org/TR/vcard-rdf/ Namespace: http://www.w3.org/2006/vcard/ns# Wednesday, May 25, 2011
- 5. Some Commonly Used RDF Vocabularies • Web Ontology Language (OWL) Project: http://www.w3.org/TR/owl2-overview/ Namespace: http://www.w3.org/ns/owl2-xml • Simple Knowledge Organisation System (SKOS) Project: http://www.w3.org/2004/02/skos/ Namespace: http://www.w3.org/2004/02/skos/core# Wednesday, May 25, 2011
- 6. Some Commonly Used RDF Vocabularies • RDF Schema (RDFS) Project: http://www.w3.org/TR/rdf-schema/ Namespace: http://www.w3.org/2000/01/rdf-schema# NB: RDFʼs namespace is: http://www.w3.org/1999/02/22-rdf-syntax-ns# • XML Schema Datatypes Project: http://www.w3.org/TR/xmlschema-2/ Namespace: http://www.w3.org/2001/XMLSchema# Wednesday, May 25, 2011
- 7. FOAF Core • Agent • age • Person • made (maker) • name • primaryTopic • title (primaryTopicOf) • img • Project • depiction (depicts) • Organization • familyName • Group • givenName • member • knows • Document • based_near • Image Wednesday, May 25, 2011
- 8. FOAF Core • Agent • based_near • Person • age • name • made (maker) • title • primaryTopic • img (primaryTopicOf) • depiction • • Project Organization (depicts) • Group • familyName • member • givenName • Document • knows • Image Wednesday, May 25, 2011
- 9. FOAF Social Web • nick • publications • mbox • currentProject • homepage • pastProject • weblog • account • openid • OnlineAccount • jabberID • accountName • mbox_sha1sum • accountServiceHomepage • interest • PersonalProfileDocument • topic_interest • tipjar • topic (page) • sha1 • workplaceHomepage • thumbnail • workInfoHomepage • logo • schoolHomepage Wednesday, May 25, 2011
- 10. DOAP Classes • CVS Repository • Git Repository • BitKeeper Repository • Subversion Repository • GNU Arch repository • darcs Repository • Version • Specification • Mercurial Repository • Repository • Project • Bazaar Branch Wednesday, May 25, 2011
- 11. DOAP Properties • Implements specification • translator • anonymous root • module • platform, browse • documenter • mailing list • wiki • programming language • repository • category • name • homepage • repository location • description • language • helper • service endpoint • tester • created • short description • developer • audience • vendor • screenshots • download mirror Wednesday, May 25, 2011
- 12. DOAP Properties • old homepage • revision • download page • license • bug database • maintainer • blog • file-release • operating system • release Wednesday, May 25, 2011
- 13. DOAP • name • homepage • developer • programming- language • os • license Wednesday, May 25, 2011
- 14. Dublin Core Classes • Agent • MediaTypeOrExtent • AgentClass • MethodOfAccrual • BibliographicResource • MethodOfInstruction • FileFormat • PeriodOfTime • Frequency • PhysicalMedium • Jurisdiction • PhysicalResource • LicenseDocument • Policy • LinguisticSystem • ProvenanceStatement • Location • RightsStatement • LocationPeriodOrJurisdicti • SizeOrDuration on • Standard • MediaType Wednesday, May 25, 2011
- 15. Dublin Core Properties • abstract • creator • accessRights • date • accrualMethod • dateAccepted • accrualPeriodicity • dateCopyrighted • accrualPolicy • dateSubmitted • alternative • description • audience • educationLevel, extent, • available format, hasFormat • bibliographicCitation • hasPart • conformsTo • hasVersion • contributor • identifier • coverage • instructionalMethod • created • isFormatOf Wednesday, May 25, 2011
- 16. Dublin Core Properties • isPartOf • publisher • isReferencedBy • references • isReplacedBy • relation • isRequiredBy • replaces • issued • requires • isVersionOf • rights • language • rightsHolder • license • source • mediator • spatial • medium • subject • modified • tableOfContents • provenance • temporal Wednesday, May 25, 2011
- 17. Dublin Core Properties • title • type • valid Wednesday, May 25, 2011
- 18. Dublin Core • abstract • creator • date • description • publisher • title Wednesday, May 25, 2011
- 19. Guidance • To name things: • rdfs:label • foaf:name • skos:prefLabel • To describe people: • FOAF, vCard • To describe projects: • DOAP Wednesday, May 25, 2011
- 20. Guidance • To describe Web pages and other publications: • dc:creator, dc:description, etc. • To describe an RDF schema/vocabulary/ ontology: • VoiD • To describe addresses: • vCard Wednesday, May 25, 2011
- 21. Guidance • To model simple data: • RDF, RDFS, vocabularies • To model existing taxonomies: • SKOS • To model complex data and/or allow for logical inference: • OWL Wednesday, May 25, 2011
- 22. This work is Copyright © 2010 David Hyland-Wood It is licensed under the Creative Commons Attribution 3.0 Unported License. Full details at: http://creativecommons.org/licenses/by/3.0/ You are free: to Share — to copy, distribute and transmit the work to Remix — to adapt the work Under the following conditions: Attribution. You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). • For any reuse or distribution, you must make clear to others the license terms of this work. • Any of the above conditions can be waived if you get permission from the copyright holder. • Nothing in this license impairs or restricts the author's moral rights. • Some Content in the work may be licensed under different terms, this is noted separately. Wednesday, May 25, 2011